COM of Continuous Bodies — JEE Main Physics MCQs with Solutions
Free JEE Main Physics COM of Continuous Bodies MCQs with step-by-step solutions (2 questions). Part of Centre of Mass, Momentum & Collisions. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — COM of Continuous Bodies · easy · numerical
The centre of mass of a uniform circular RING lies:
A. At its geometric centre, where there is no mass ✓ Correct
B. On the rim
C. R/2 above the centre
D. At 2R/π from the centre
Solution: By symmetry the COM is the centre — an empty point, showing the COM need not lie within the material.
Q2 — COM of Continuous Bodies · medium · numerical
An L-shaped lamina is made of two identical uniform squares of side 1 m — one at the origin, one directly to its right. The COM of the combination is at:
A. (1, 1) m
B. (1, 0.5) m ✓ Correct
C. (0.5, 0.5) m
D. (0.75, 0.5) m
Solution: Centres: (0.5, 0.5) and (1.5, 0.5), equal masses ⇒ midpoint (1, 0.5).